Blake Tierney (born January 10, 2002) is a Canadian competitive swimmer, primarily competing in the backstroke events.

[1] In April 2023, Tierney was named to Canada's 2023 Pan American Games team.

[2] At the games, Tierney won five medals, including four in relays.

[3] At the 2024 Canadian Swim Trials, Tierney broke the national record in the 200 metres backstroke event, with a timing of 1:56.74.

[4] At the conclusion of the trials, Tierney was named to Canada's 2024 Olympics team.